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    <script>
        function rightchange(char,n) {
            n = n % char.length;
            // 字符串转数组
            var arr = char.split("");
            // 循环
            for (var i = 1 ; i <= n ; i++) {
                arr.unshift(arr.pop());
            }
            // 转回字符串
            char = arr.join("");
            return char;
        }
        console.log(rightchange("char",2))
    </script>
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